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Finding the Fourth Proportional to 290,470.40, 435,705.60 and 183,939.20

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Solution

The fourth proportional to 290,470.40, 435,705.60 and 183,939.20 is: 275,908.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,470.40 : 435,705.60 = 183,939.20 : x
  2. Step 2: Convert to fraction form
    290,470.40/435,705.60 = 183,939.20/x
  3. Step 3: Cross multiply
    290,470.40x = 435,705.60 × 183,939.20
  4. Step 4: Simplify right side
    290,470.40x = 80,143,339,499.52
  5. Step 5: Solve for x
    x = 80,143,339,499.52/290,470.40
  6. Step 6: Final answer
    x = 275,908.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.